Abstract

We report a ferromagneticcarbonmaterial that is attracted by a permanent magnet. The ferromagneticcarbonmaterial was prepared by pyrolysis of polyacrylonitrile at 1273 K for 1 h. Chemical analysis combined with an energy-dispersive x-ray analysis revealed that the carbonmaterial did not contain any transition metals. The metal-free ferromagneticcarbonmaterial exhibited a saturationmagnetization of 1.22 emu/g at room temperature.

Received 16 October 2010Accepted 12 January 2011Published online 01 February 2011

Acknowledgments:

This work was supported by a Grant-in-Aid for Scientific Research (Grant No. 19560708) from the Japan Society for the Promotion of Science. This work was also partly supported by the Center for Integrated Nanotechnology Support at Tohoku University and by the Nanotechnology Network Project of the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan. The use of the facilities of the Materials Design and Characterization Laboratory at the Institute for Solid State Physics, University of Tokyo is gratefully acknowledged.